MPEC 2018-S38 : COMET C/2018 R5 (Lemmon)
The following Minor Planet Electronic Circular may be linked-to from your own Web pages, but must not otherwise be redistributed electronically.A form allowing access to any MPEC is at the bottom of this page.
Read MPEC 2018-S37
Read MPEC 2018-S39
M.P.E.C. 2018-S38 Issued 2018 Sept. 18, 16:51 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Division F of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
COMET C/2018 R5 (Lemmon)
This comet was initially reported as asteroidal. E. J. Christensen (I52)
reported a 10" coma, slightly extended toward the north, as seen in 4x60s
images under good conditions. K. Sarneczky and R. Szakats (K88) reported
that the object appeared softer than nearby stars of similar brightness (FWHM
was ~ 4".0 in 3".0 seeing). S. Gajdos (118) reported a circular diffuse coma
with diameter ~ 7" and no tail on 16x80s images.
Observations:
CK18R050 C2018 07 05.54722 00 04 39.537+40 05 05.18 20.5 GVES038F51
CK18R050 C2018 07 05.55854 00 04 39.431+40 05 04.20 21.0 GVES038F51
CK18R050 C2018 07 05.56978 00 04 39.332+40 05 03.68 20.9 GVES038F51
CK18R050 C2018 07 05.58102 00 04 39.206+40 05 03.11 21.7 GVES038F51
CK18R050 C2018 08 01.59150 23 52 26.657+38 32 22.27 20.7 GVES038F51
CK18R050 C2018 08 01.60126 23 52 26.183+38 32 18.07 20.5 GVES038F51
CK18R050 C2018 08 15.48575 23 39 54.861+36 36 27.97 19.4 GVES038F51
CK18R050 C2018 08 15.49855 23 39 54.028+36 36 19.83 20.9 GVES038F51
CK18R050 C2018 08 15.51138 23 39 53.234+36 36 11.53 19.5 GVES038F51
CK18R050* C2018 09 08.23378 23 11 51.30 +30 41 27.3 19.0 GVES038G96
CK18R050 C2018 09 08.23896 23 11 50.87 +30 41 22.8 19.1 GVES038G96
CK18R050 C2018 09 08.24414 23 11 50.51 +30 41 16.2 VES038G96
CK18R050 C2018 09 08.24933 23 11 50.12 +30 41 10.1 19.3 GVES038G96
CK18R050 C2018 09 08.37829 23 11 40.28 +30 38 40.2 19.4 GVES038I52
CK18R050 C2018 09 08.38426 23 11 39.79 +30 38 33.2 VES038I52
CK18R050 C2018 09 08.39016 23 11 39.31 +30 38 26.2 VES038I52
CK18R050 KC2018 09 08.81213 23 11 07.87 +30 30 11.7 19.5 VSES038151
CK18R050 KC2018 09 08.81523 23 11 07.64 +30 30 08.0 19.5 VSES038151
CK18R050 KC2018 09 08.81832 23 11 07.41 +30 30 04.4 19.5 VSES038151
CK18R050 KC2018 09 08.83904 23 11 05.84 +30 29 38.8 19.3 RqES038A17
CK18R050 KC2018 09 08.84688 23 11 05.14 +30 29 30.5 19.4 GVES038C47
CK18R050 KC2018 09 08.85082 23 11 04.88 +30 29 25.6 19.7 RqES038A17
CK18R050 KC2018 09 08.85404 23 11 04.59 +30 29 22.6 20.2 GVES038C47
CK18R050 KC2018 09 08.86283 23 11 04.06 +30 29 10.8 19.6 RqES038A17
CK18R050 KC2018 09 08.86400 23 11 03.94 +30 29 10.1 20.3 GVES038C47
CK18R050 KC2018 09 08.91023 23 11 00.41 +30 28 17.1 19.4 GVES038595
CK18R050 KC2018 09 08.93256 23 10 58.65 +30 27 50.6 19.8 GVES038595
CK18R050 KC2018 09 08.93882723 10 58.12 +30 27 42.7 19.7 GVES038L01
CK18R050 KC2018 09 08.94114623 10 58.00 +30 27 39.5 19.6 GVES038L01
CK18R050 KC2018 09 09.04865 23 10 49.86 +30 25 33.4 19.4 RqES038K63
CK18R050 KC2018 09 09.05079 23 10 49.71 +30 25 31.0 19.1 RqES038K63
CK18R050 KC2018 09 09.05486 23 10 49.39 +30 25 25.7 19.4 RqES038K63
CK18R050 C2018 09 09.20725 23 10 38.16 +30 22 26.5 VES038I52
CK18R050 C2018 09 09.21091 23 10 37.80 +30 22 22.3 19.4 GVES038I52
CK18R050 C2018 09 09.21457 23 10 37.49 +30 22 17.9 19.4 GVES038I52
CK18R050 C2018 09 09.21824 23 10 37.23 +30 22 13.4 19.4 GVES038I52
CK18R050 5C2018 09 09.46989 23 10 18.03 +30 17 14.3 VES038U69
CK18R050 5C2018 09 09.47274 23 10 17.80 +30 17 10.7 VES038U69
CK18R050 5C2018 09 09.47560 23 10 17.63 +30 17 07.4 19.6 VES038U69
CK18R050 C2018 09 10.22376 23 09 21.67 +30 02 13.5 19.7 GVES038I52
CK18R050 C2018 09 10.22573 23 09 21.50 +30 02 10.8 19.5 GVES038I52
CK18R050 C2018 09 10.23028 23 09 21.18 +30 02 05.5 19.2 GVES038I52
CK18R050 C2018 09 10.23266 23 09 21.01 +30 02 02.8 18.6 GVES038I52
CK18R050 KC2018 09 10.27428 23 09 17.77 +30 01 11.8 18.8 RqES038H36
CK18R050 KC2018 09 10.28894 23 09 16.64 +30 00 54.1 19.1 RqES038H36
CK18R050 KC2018 09 10.29188 23 09 16.43 +30 00 50.9 19.1 RqES038H36
CK18R050 C2018 09 11.18770 23 08 09.41 +29 42 42.6 19.1 G ES038I52
CK18R050 C2018 09 11.18957 23 08 09.21 +29 42 39.6 19.6 G ES038I52
CK18R050 C2018 09 11.19670 23 08 08.73 +29 42 31.0 19.4 G ES038I52
CK18R050 C2018 09 11.20255 23 08 08.26 +29 42 23.8 19.8 G ES038I52
CK18R050 KC2018 09 11.83210 23 07 21.18 +29 29 28.5 19.3 RqES038C10
CK18R050 KC2018 09 11.84414 23 07 20.29 +29 29 13.4 19.2 RqES038C10
CK18R050 KC2018 09 11.85618 23 07 19.40 +29 28 58.3 19.1 RqES038C10
CK18R050 KC2018 09 11.86822 23 07 18.40 +29 28 44.1 18.5 RqES038K61
CK18R050 KC2018 09 11.86989 23 07 18.28 +29 28 42.0 18.9 RqES038K61
CK18R050 KC2018 09 11.87391 23 07 18.01 +29 28 36.9 18.5 RVES038K38
CK18R050 KC2018 09 11.88159 23 07 17.47 +29 28 28.7 19.9 VqES038C77
CK18R050 KC2018 09 11.89579 23 07 16.31 +29 28 09.6 18.6 RVES038K38
CK18R050 KC2018 09 11.90245 23 07 15.83 +29 28 01.7 19.0 VES038104
CK18R050 KC2018 09 11.90820 23 07 15.38 +29 27 54.8 19.1 VES038104
CK18R050 KC2018 09 11.91395 23 07 14.96 +29 27 48.0 19.0 VES038104
CK18R050 KC2018 09 11.91535 23 07 14.86 +29 27 44.8 19.7 VqES038A71
CK18R050 KC2018 09 11.92057 23 07 14.45 +29 27 39.1 18.5 RVES038K38
CK18R050 KC2018 09 11.92614 23 07 14.05 +29 27 31.7 19.7 VqES038A71
CK18R050 KC2018 09 11.93495 23 07 13.40 +29 27 21.7 19.5 VqES038C77
CK18R050 KC2018 09 11.93765 23 07 13.20 +29 27 17.4 19.8 VqES038A71
CK18R050 9C2018 09 12.08894 23 07 01.79 +29 24 11.7 19.3 VUES038G40
CK18R050 9C2018 09 12.10253 23 07 00.76 +29 23 54.3 19.1 VUES038G40
CK18R050 C2018 09 12.81792 23 06 07.53 +29 08 59.9 qES038246
CK18R050 C2018 09 12.82022 23 06 07.35 +29 08 57.3 qES038246
CK18R050 C2018 09 12.82278 23 06 07.19 +29 08 53.1 18.3 RqES038246
CK18R050 KC2018 09 12.83761 23 06 06.11 +29 08 35.0 VES038113
CK18R050 KC2018 09 12.84214 23 06 05.69 +29 08 30.2 18.6 RVES038113
CK18R050 KC2018 09 12.85120 23 06 05.07 +29 08 17.7 18.5 RVES038113
CK18R050 KC2018 09 12.85573 23 06 04.70 +29 08 11.9 18.2 RVES038113
CK18R050 KC2018 09 12.89942 23 06 01.40 +29 07 17.5 19.0 qES038215
CK18R050 KC2018 09 12.90204 23 06 01.24 +29 07 14.3 19.2 qES038215
CK18R050 KC2018 09 12.90466 23 06 01.07 +29 07 11.1 19.2 qES038215
CK18R050 C2018 09 13.16535 23 05 41.70 +29 01 42.6 18.9 GUES038I52
CK18R050 C2018 09 13.16709 23 05 41.59 +29 01 40.9 19.0 GUES038I52
CK18R050 C2018 09 13.16849 23 05 41.51 +29 01 39.1 18.7 GUES038I52
CK18R050 C2018 09 13.17024 23 05 41.37 +29 01 36.8 19.0 GUES038I52
CK18R050 KC2018 09 13.86623 23 04 49.62 +28 46 52.5 19.3 RqES038K63
CK18R050 KC2018 09 13.86783623 04 49.51 +28 46 50.7 19.3 VqES038C95
CK18R050 KC2018 09 13.86959 23 04 49.34 +28 46 48.4 19.2 RqES038K63
CK18R050 KC2018 09 13.87323 23 04 49.08 +28 46 44.3 19.2 RqES038K63
CK18R050 KC2018 09 13.87841723 04 48.68 +28 46 36.7 19.4 VqES038C95
CK18R050 KC2018 09 13.88899923 04 47.91 +28 46 24.2 18.8 VqES038C95
CK18R050 KC2018 09 13.89958023 04 47.11 +28 46 09.5 19.3 VqES038C95
CK18R050 KC2018 09 14.02632 23 04 37.54 +28 43 27.6 19.6 RoES038K88
CK18R050 KC2018 09 14.03440 23 04 36.95 +28 43 17.3 19.1 RoES038K88
CK18R050 KC2018 09 14.04249 23 04 36.34 +28 43 07.1 19.1 RoES038K88
CK18R050 KC2018 09 14.96303 23 03 28.35 +28 23 21.2 19.0 RoES038K88
CK18R050 KC2018 09 14.97112 23 03 27.73 +28 23 10.8 18.7 RoES038K88
CK18R050 KC2018 09 15.10603 23 03 18.00 +28 20 16.2 18.9 RuES038850
CK18R050 KC2018 09 15.12016 23 03 16.89 +28 19 56.6 18.8 RuES038850
CK18R050 KC2018 09 15.13421 23 03 15.87 +28 19 39.0 19.6 RuES038850
CK18R050 KC2018 09 15.15265 23 03 14.50 +28 19 15.8 oES038711
CK18R050 KC2018 09 15.15596 23 03 14.25 +28 19 11.7 oES038711
CK18R050 KC2018 09 15.15923 23 03 14.01 +28 19 07.3 oES038711
CK18R050 KC2018 09 15.88687 23 02 20.48 +28 03 15.7 18.6 RoES038K88
CK18R050 KC2018 09 15.89333 23 02 20.02 +28 03 07.2 19.0 RoES038K88
CK18R050 KC2018 09 15.89978 23 02 19.50 +28 02 58.5 18.8 RoES038K88
CK18R050 "C2018 09 16.17033 23 01 59.46 +27 57 03.2 19.5 VqES038G40
CK18R050 "C2018 09 16.18432 23 01 58.45 +27 56 44.2 19.5 VqES038G40
CK18R050 "C2018 09 16.19825 23 01 57.42 +27 56 25.7 19.3 VqES038G40
CK18R050 KC2018 09 16.20933 23 01 56.78 +27 56 11.7 19.1 RuES038850
CK18R050 KC2018 09 16.22317 23 01 55.73 +27 55 54.4 18.7 RuES038850
CK18R050 KC2018 09 16.82713 23 01 11.70 +27 42 31.1 VES038118
CK18R050 KC2018 09 16.83894 23 01 10.90 +27 42 16.1 VES038118
CK18R050 KC2018 09 16.85074 23 01 09.96 +27 42 00.9 VES038118
CK18R050 KC2018 09 16.94159 23 01 03.29 +27 40 01.0 19.1 RqES038585
CK18R050 KC2018 09 16.94411 23 01 03.14 +27 39 56.8 19.2 RqES038585
CK18R050 KC2018 09 16.94621 23 01 02.99 +27 39 54.1 19.0 RqES038585
CK18R050 KC2018 09 16.94732 23 01 02.88 +27 39 53.0 19.1 RqES038585
CK18R050 KC2018 09 16.94872 23 01 02.77 +27 39 51.1 19.1 RqES038585
CK18R050 KC2018 09 16.94956 23 01 02.69 +27 39 50.1 19.1 RqES038585
CK18R050 KC2018 09 16.95767 23 01 02.15 +27 39 39.1 18.1 RqES038C23
CK18R050 KC2018 09 16.96128 23 01 01.93 +27 39 32.7 18.7 RqES038C23
CK18R050 KC2018 09 16.96922 23 01 01.35 +27 39 24.9 18.3 RqES038C23
CK18R050 KC2018 09 16.97210 23 01 01.07 +27 39 20.9 18.3 RqES038C23
CK18R050 KC2018 09 16.97571 23 01 00.64 +27 39 14.7 18.6 RqES038C23
CK18R050 "C2018 09 17.10782 23 00 51.11 +27 36 19.6 19.4 VqES038G40
CK18R050 "C2018 09 17.12190 23 00 50.08 +27 36 01.2 qES038G40
CK18R050 "C2018 09 17.13562 23 00 49.04 +27 35 42.4 19.2 VqES038G40
CK18R050 KC2018 09 18.06480 22 59 41.65 +27 14 53.5 18.7 RqES038C23
CK18R050 KC2018 09 18.06824 22 59 41.49 +27 14 48.8 18.1 RqES038C23
CK18R050 KC2018 09 18.07257 22 59 41.24 +27 14 43.8 18.4 RqES038C23
CK18R050 KC2018 09 18.07690 22 59 40.76 +27 14 37.4 18.4 RqES038C23
CK18R050 KC2018 09 18.08123 22 59 40.56 +27 14 30.0 18.6 RqES038C23
CK18R050 KC2018 09 18.18009 22 59 33.54 +27 12 18.9 19.0 RuES038850
CK18R050 KC2018 09 18.19414 22 59 32.47 +27 12 00.6 19.0 RuES038850
CK18R050 KC2018 09 18.20817 22 59 31.46 +27 11 42.2 19.8 RuES038850
CK18R050 C2018 09 18.20819 22 59 31.53 +27 11 41.1 19.1 GVES038I52
CK18R050 C2018 09 18.21448 22 59 31.03 +27 11 32.5 19.3 GVES038I52
CK18R050 C2018 09 18.22078 22 59 30.65 +27 11 23.8 19.6 GVES038I52
CK18R050 KC2018 09 18.22233 22 59 30.42 +27 11 21.2 18.6 RuES038850
CK18R050 C2018 09 18.22708 22 59 30.17 +27 11 15.3 19.2 GVES038I52
Observer details:
104 San Marcello Pistoiese. Observers P. Bacci, M. Maestripieri. Measurers
P. Bacci, L. Tesi, G. Fagioli. 0.60-m reflector + CCD.
113 Volkssternwarte Drebach, Schoenbrunn. Observers A. Knoefel,
G. Lehmann. 0.5-m f/4.6 reflector + CCD.
118 Astronomical and Geophysical Observatory, Modra. Observer S. Gajdos.
0.6-m f/5.5 reflector + CCD.
151 Eschenberg Observatory, Winterthur. Observer M. Griesser. 0.6-m f/3.8
astrograph + CCD.
215 Buchloe. Observer W. Hasubick. 0.44-m f/4.6 reflector + CCD.
246 Klet Observatory-KLENOT. Observers M. Tichy, J. Ticha. Measurer
M. Tichy. 1.06-m KLENOT Telescope + CCD.
585 Kyiv comet station. Observer A. Baransky. 0.7-m f/4 reflector + CCD.
595 Farra d'Isonzo. Observers U. Montanar, E. Pettarin, F. Piani. Measurer
U. Montanar. 0.61-m f/4.0 reflector + CCD.
711 McDonald Observatory, Fort Davis. Observer J. G. Ries. 2.1-m reflector
+ CCD + focal reducer.
850 Cordell-Lorenz Observatory, Sewanee. Observer D. T. Durig. 0.3-m f/9.4
Schmidt-Cassegrain + 3072x2048 CCD, 0.3-m f/7.6
Schmidt-Cassegrain + 1536x1024 CCD.
A17 Guidestar Observatory, Weinheim. Observers M. Emmerich, S. Melchert.
0.36-m f/6 Schmidt-Cassegrain + CCD.
A71 Stixendorf. Observers M. Jaeger, E. Prosperi, S. Prosperi, W. Vollmann.
Measurer M. Jaeger. 0.3-m f/4 reflector + CCD.
C10 Maisoncelles. Observer J.-F. Soulier. 0.30-m f/3.8 Newtonian reflector
+ CCD.
C23 Olmen. Observer A. Diepvens.
C47 Nonndorf. Observer G. Dangl. 0.25-m f/4.8 reflector + CCD.
C77 Bernezzo Observatory. Observer A. Mantero. 0.25-m f/1000.0 reflector +
CCD.
C95 SATINO Remote Observatory, Haute Provence. Observer J. Jahn. 0.60-m
f/3.2 Newtonian reflector + CCD.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, T. Lowe, A. Schultz,
M. Willman. Measurers K. Chambers, S. Chastel, L. Denneau, H. Flewelling,
M. Huber, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m
Ritchey-Chretien + CCD.
G40 Slooh.com Canary Islands Observatory. Observers B. Lutkenhoner,
G. Gasparovic, Y. Chen. Measurers B. Lutkenhoner, G. Gasparovic, Y. Chen,
G. Y. Gasparovic. 0.5-m f/6.8 Corrected Dall-Kirkham + CCD, 0.43-m f/6.8
Corrected Dall-Kirkham + CCD.
G96 Mt. Lemmon Survey. Observer A. D. Grauer. Measurers B. M. Africano,
E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
H. Groeller, J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard,
R. L. Seaman, F. C. Shelly. 1.5-m reflector + 10K CCD.
H36 Sandlot Observatory, Scranton. Observer G. Hug. 0.56-m reflector + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observers G. J. Leonard,
R. A. Kowalski, E. J. Christensen, D. C. Fuls. Measurers B. M. Africano,
E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
H. Groeller, J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard,
R. L. Seaman, F. C. Shelly. 1.0-m reflector + CCD.
K38 M57 Observatory, Saltrio. Observer G. Baj. 0.3-m f/5.5 Ritchey-Chretien
+ CCD.
K61 Rokycany Observatory. Observer M. Adamovsky. 0.51-m f/6.8 reflector +
CCD.
K63 G. Pascoli Observatory, Castelvecchio Pascoli. Observer R. Bacci.
0.41-m f/3.2 Newtonian reflector + CCD.
K88 GINOP-KHK, Piszkesteto. Observers R. Szakats, K. Sarneczky.
Measurer K. Sarneczky. 0.60-m Schmidt + CCD.
L01 Visnjan Observatory, Tican. Observers K. Korlevic, I. Lyon. Measurer
K. Korlevic. 1.0-m f/2.9 reflector + CCD.
U69 iTelescope SRO Observatory, Auberry. Observer H. Sato. 0.61-m f/6.5
astrograph + CCD.
Orbital elements:
C/2018 R5 (Lemmon)
Epoch 2018 Dec. 28.0 TT = JDT 2458480.5
T 2019 Jan. 9.94035 TT MPCW
q 3.6213615 (2000.0) P Q
n 0.00904389 Peri. 178.00227 +0.98875127 -0.00214088
a 22.8156396 Node 171.14299 -0.14713315 +0.16580441
e 0.8412772 Incl. 103.75428 -0.02688430 -0.98615633
P 109
From 135 observations 2018 July 5-Sept. 18, mean residual 0".4.
C/2018 R5 (Lemmon)
Epoch 2127 Aug. 19.0 TT = JDT 2498160.5
T 2127 Aug. 1.83858 TT MPCW
q 3.6196239 (2000.0) P Q
n 0.00889570 Peri. 177.93913 +0.98888534 -0.00059956
a 23.0683164 Node 171.19842 -0.14648998 +0.16707999
e 0.8430911 Incl. 103.66969 -0.02542585 -0.98594316
P 111
From 135 observations 2018 July 5-Sept. 18, mean residual 0".4.
C/2018 R5 (Lemmon)
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5
T 2019 Jan. 9.95230 TT MPCW
q 3.6212909 (2000.0) P Q
n 0.00904586 Peri. 178.00352 +0.98874072 -0.00219822
a 22.8123237 Node 171.13863 -0.14719472 +0.16569391
e 0.8412573 Incl. 103.76097 -0.02693513 -0.98617478
P 109
From 135 observations 2018 July 5-Sept. 18, mean residual 0".4.
Ephemeris:
C/2018 R5 (Lemmon)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2018 08 19 23 36 10.0 +35 57 08 3.1361 3.8110 125.3 12.5 19.8
...
2018 09 03 23 18 24.4 +32 17 54 2.9524 3.7746 139.3 10.0 19.6
...
2018 09 11 23 08 23.4 +29 46 33 2.8839 3.7567 145.4 8.7 19.5
...
2018 09 17 23 00 59.1 +27 38 45 2.8486 3.7439 148.7 8.0 19.5
2018 09 18 22 59 46.6 +27 16 24 2.8442 3.7418 149.0 7.9 19.5
2018 09 19 22 58 34.6 +26 53 46 2.8401 3.7397 149.4 7.9 19.5
...
2018 09 25 22 51 36.8 +24 32 57 2.8247 3.7277 150.1 7.7 19.5
...
2018 10 03 22 43 08.9 +21 15 16 2.8279 3.7127 147.7 8.3 19.5
...
2018 10 18 22 30 39.1 +14 57 13 2.9062 3.6874 135.9 10.8 19.5
Gareth V. Williams (C) Copyright 2018 MPC M.P.E.C. 2018-S38
Read MPEC 2018-S37
Read MPEC 2018-S39
Enter an MPEC number in one of the following forms:
- 1997-B01 (the full form)
- J97B01 (the packed version of the full form)
- B01 (the abbreviated form)